1 Features
• Latch-up immune
• Dual supply range: ±4.5V to ±22V
• Single supply range: 4.5V to 44V
• Low on-resistance: 4Ω
• Low charge injection: 3pC
• High current support: 400mA (maximum) (WQFN)
• High current support: 300mA (maximum) (TSSOP)
• –40°C to +125°C operating temperature
• 1.8V logic compatible inputs
• Integrated pull-down resistor on logic pins
• Fail-safe logic
• Rail-to-rail operation
• Bidirectional signal path
• Break-before-make switching

2 Applications
• Factory automation and control
• Programmable logic controllers (PLC)
• Analog input modules
• Semiconductor test equipment
• Battery test equipment
• Ultrasound scanners
• Patient monitoring and diagnostics
• Optical networking
• Optical test equipment
• Wired networking
• Data acquisition systems (DAQ)

3 Description
The TMUX7208 is a precision 8:1, single channel
multiplexer while the TMUX7209 is a 4:1, 2 channel
multiplexer featuring low on resistance and charge
injection. The devices work with a single supply (4.5V
to 44V), dual supplies (±4.5V to ±22V), or asymmetric
supplies (such as VDD = 12V, VSS = –5V). The
TMUX720x support bidirectional analog and digital
signals on the source (Sx) and drain (D) pins ranging
from VSS to VDD.
The TMUX720x are part of the precision switches
and multiplexers family of devices and have very
low on and off leakage currents allowing them to
be used in high precision measurement applications.
The TMUX720x family provides latch-up immunity,
preventing undesirable high current events between
parasitic structures within the device typically caused
by overvoltage events. A latch-up condition typically
continues until the power supply rails are turned off
and can lead to device failure. The latch-up immunity
feature allows the TMUX720x family of switches and
multiplexers to be used in harsh environments.